134886809 has 2 divisors, whose sum is σ = 134886810. Its totient is φ = 134886808.

The previous prime is 134886781. The next prime is 134886839. The reversal of 134886809 is 908688431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128142400 + 6744409 = 11320^2 + 2597^2 .

It is a cyclic number.

It is not a de Polignac number, because 134886809 - 2¹⁶ = 134821273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (134886839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67443404 + 67443405.

It is an arithmetic number, because the mean of its divisors is an integer number (67443405).

Almost surely, 2^134886809 is an apocalyptic number.

It is an amenable number.

134886809 is a deficient number, since it is larger than the sum of its proper divisors (1).

134886809 is an equidigital number, since it uses as much as digits as its factorization.

134886809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 134886809 is about 11614.0780520883. The cubic root of 134886809 is about 512.8493706639.

The spelling of 134886809 in words is "one hundred thirty-four million, eight hundred eighty-six thousand, eight hundred nine".